From 01f33407182b48546816b2d9f830600996df3efa Mon Sep 17 00:00:00 2001
From: Benjamin Sergeant <bsergean@gmail.com>
Date: Tue, 24 Sep 2019 14:17:03 -0700
Subject: [PATCH] speedup base64 code by reserving memory

---
 ixcrypto/ixcrypto/IXBase64.cpp | 11 +++++++++--
 ixcrypto/ixcrypto/IXBase64.h   |  1 +
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/ixcrypto/ixcrypto/IXBase64.cpp b/ixcrypto/ixcrypto/IXBase64.cpp
index 2cee0f69..a2b4001b 100644
--- a/ixcrypto/ixcrypto/IXBase64.cpp
+++ b/ixcrypto/ixcrypto/IXBase64.cpp
@@ -35,15 +35,21 @@ namespace ix
     "0123456789+/";
 
     std::string base64_encode(const std::string& data, size_t len)
+    {
+        const char* bytes_to_encode = data.c_str();
+        return base64_encode(bytes_to_encode, len);
+    }
+
+    std::string base64_encode(const char* bytes_to_encode, size_t len)
     {
         std::string ret;
+        ret.reserve(((len + 2) / 3) * 4);
+
         int i = 0;
         int j = 0;
         unsigned char char_array_3[3];
         unsigned char char_array_4[4];
 
-        const char* bytes_to_encode = data.c_str();
-
         while(len--)
         {
             char_array_3[i++] = *(bytes_to_encode++);
@@ -95,6 +101,7 @@ namespace ix
         int in_ = 0;
         unsigned char char_array_4[4], char_array_3[3];
         std::string ret;
+        ret.reserve(((in_len + 3) / 4) * 3);
 
         while(in_len-- && ( encoded_string[in_] != '=') && is_base64(encoded_string[in_]))
         {
diff --git a/ixcrypto/ixcrypto/IXBase64.h b/ixcrypto/ixcrypto/IXBase64.h
index 38527ea2..07bad77b 100644
--- a/ixcrypto/ixcrypto/IXBase64.h
+++ b/ixcrypto/ixcrypto/IXBase64.h
@@ -11,5 +11,6 @@
 namespace ix
 {
     std::string base64_encode(const std::string& data, size_t len);
+    std::string base64_encode(const char* data, size_t len);
     std::string base64_decode(const std::string& encoded_string);
 } // namespace ix